Subscriber CAS card
Subscriber CAS card is a "key" to the scrambled TV content broadcasted by the TV operator. It allows to manage subscriber's rights and permissions.
The card has its own unique ID which is stored in CAS database. Card must be used with STB (set top box) or CAM (condition access module) which supports actual CAS.
Original cards are preprogrammed to work in actual CAS by manufacturer. The operator programs card (subscriber) ID and operator ID with special programmer (can be included in supply kit). Subscriber ID can be changed later by the operator, operator ID cannot be changed in the future, just in factory conditions. Thus, once programmed, the card belongs to the operator, who has programmed it.
Card has standard CR80 size.